Want to exchange money with someone? On the Gmail Android app, it's as easy as composing an email. Here's how to send money and request that your friends pay up.

While the Gmail mobile apps don't allow you to select all emails on iPhone and top budget Android phones, you can use the web version to complete the job.

Google's work on optimizing Gmail for Android tablets and foldables continues with a new formatting bar and Smart Compose.

Read More Using the tablet-friendly, two-pane Gmail on your regular old computer is pretty simple, and it employs the same user agent tricks that we've used for all kinds of things in the past.

You can add labels in Gmail to help yourself organize your emails using a computer or mobile device.